On Thursday, 08/28/2008 at 11:55 EDT, Kris Buelens <[EMAIL PROTECTED]> wrote: > Wrong discussion: LPAR is always there on modern machines. The choice thus is > LPAR only + z/OS guests or > LPAR + z/VM + z/OS guests > As far as CPU is concerned, z/VM would add a second virtualization > layer between z/OS and the real HW.
Since the OP has only one LPAR on a z800, my suggestion is to run z/VM native instead. That means z/VM 2nd level will have SIE available to it and 3rd level guests will run very nicely. The performance of this configuration will not survive a hardware upgrade (z890/z990 and later), however, since they require the use of LPAR. Alan Altmark z/VM Development IBM Endicott
